The occurrence of strains of Haemonchus contortus resistant to thiabendazole.
D000818:Animals; D004352:Drug Resistance, Microbial; D012756:Sheep; D012757:Sheep Diseases / Q000188:drug therapy*; D013827:Thiabendazole / Q000008:administration & dosage*; D014252:Trichostrongyloidiasis / Q000188:drug therapy / Q000662:veterinary*
D013827:Thiabendazole